AirHint found the following cheapest return flights from San Diego (SAN) to San Juan (SJU) in March 2026 (see full year).

Return flights

01 Mar - 08 Mar	Frontier Airlines
08 Mar - 13 Mar	United
19 Mar - 24 Mar	Southwest Airlines
09 Mar - 14 Mar	Frontier Airlines
12 Mar - 20 Mar	United
15 Mar - 21 Mar	Frontier Airlines
13 Mar - 21 Mar	Frontier Airlines

Also check the deals for one-way flights from San Diego to San Juan in March.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from San Diego to San Juan in March from 288€

Return flights